The Fantasy World's Ancestor: I'm Seriously Too Powerful

He unexpectedly transmigrates to a world of cultivation. In this life, his name is Nangong Haotian. Keep a low profile. Don’t go looking for trouble! He has hidden away in the family’s secret realm for tens of thousands of years, all for the sake of attaining the dual-sage realm. The family’s most beloved junior is about to be forced into a political marriage? A furious shout rings out from the Nangong secret realm! Who dares bully my clansman?!